Fix module-aware dependency resolution

[Vashkatsi]

Summary\n\n- replace global name matching with module-qualified symbol resolution\n- support absolute and relative imports, aliases, analysis-root preference, and fail-closed ambiguity\n- track lexical bindings and shadowing across functions, classes, comprehensions, loops, match, and short-circuit expressions\n- preserve the v1.0 DeplyRunner single-layer map while supporting overlapping layers\n- build and smoke-test installable wheel and source distributions\n- document exact static-analysis boundaries and resolved roadmap item\n\n## Backward compatibility\n\n- CLI commands, flags, config schema, report formats, and exit-code contract are unchanged\n- 167 retained tests from v1.0.0 pass on Python 3.8 and 3.14\n- three obsolete v1.0.0 assertions intentionally changed: two used imports invalid at runtime, one expected a false-positive dependency\n- representative legacy config validates and analyzes 1,679 elements on Python 3.8 and 3.14\n\n## Verification\n\n- make check: 221 tests, Ruff, mypy, and pip-audit passed\n- Python 3.8: 221 tests passed, 7 skipped\n- mutation: 2,554 total; 0 timeout, suspicious, or segfault\n- wheel and sdist: PEP 517 build, twine check, clean install, CLI smoke, and 221 packaged tests passed\n- independent review pending final CI

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